io_uring: clean up io_poll_remove_waitqs()

Move some parts of io_poll_remove_waitqs() that are opcode independent.
Looks better and stresses that both do __io_poll_remove_one().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/bbc717f82117cc335c89cbe67ec8d72608178732.1618278933.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -5219,21 +5219,16 @@ static bool io_poll_remove_waitqs(struct io_kiocb *req)
 	bool do_complete;
 
 	io_poll_remove_double(req);
+	do_complete = __io_poll_remove_one(req, io_poll_get_single(req), true);
 
-	if (req->opcode == IORING_OP_POLL_ADD) {
-		do_complete = __io_poll_remove_one(req, &req->poll, true);
-	} else {
+	if (req->opcode != IORING_OP_POLL_ADD && do_complete) {
 		struct async_poll *apoll = req->apoll;
 
 		/* non-poll requests have submit ref still */
-		do_complete = __io_poll_remove_one(req, &apoll->poll, true);
-		if (do_complete) {
 		req_ref_put(req);
 		kfree(apoll->double_poll);
 		kfree(apoll);
 	}
-	}
-
 	return do_complete;
 }